Rubber vulcanization and the product thereof



Hoi9rawing.

srunn'r Barron MOLONY; or wnLLBsLBv mus, 'massnonusnrrrs, assxenoa re 1v momen cnnmcnt comramr;

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F allwhom it may conce'rn." j

-Be it known that I, ST ARrBQ-MOLON a citizen of the United Statestresidingat Wellesley Hills, mule county at s an and j State ofMassachusetts; have invented-certain new and useful Improvements, inRub- .ber vulcanization andthe Products Thereof,

. of which'the following isl'a' specification.

, a product, which is durability.

I The-invention relates to the vulcanization of rubber. It, hasforitsprincipaI objects the (provision of: aprocess,]w(hereb the, rapiity of vulcanization isincrea'se and which can bepractised at ami'nimumex pense, with a relatively small' quantity .of the-accelerating. agent,and the provision of,

of superior quality and The accelerating .coin ound -i n fi from beetsugar molasses or its residue.

" tion) in retorts at a temperature of 900 to This residue is subjectedto .a'dry distillation (also known as a destructive distilla- 1300degrees F. The vaporsor gases pro:

may be conducted through an acid tol'ne'u-i sulfuric acid about [2500cubic centimeters of the accelerating agent. This" li'uid -is a beingused at a strength'of 6 0 B.- ,The resultin'g :liquid isevaporatediwhereby ami moni um salts crystallize-out. These a'mmonfiumfsalts are preferably removed by, any suitable procedure such \ascentrifugal action. The liquid remaining".contains-{the ingredientsconstituting the .essential part treated with an alkali such asiquiclie-"to decompose it and the vapor produced is 7 passed through anabsorbent "comprising lytic action incident to the use of acceleratorsin the vulcanization of rubber.- I be'-' lieve that theacceleratingfaction, of the compound is due to one or more amin bases]contained in the compound the identity thereof being more or lessuncertain, as we as the individual efiect of such bases. My

information as to their action is limited to Speeiii'cation of LettersPatent.

for otheruse's; meant ammonia N *vulcanization is comp ijminutes- Theproces'sma a with synthetic," reclaimed of rub r produced is-ofasuperior uality' and .durasimilar to lead, such as co .per are not pres-Patented s aeaaj iesn lepplication filed June 17,1913, Serial No.

i thefact that one or more of thex n in ooiij tion t with theother-ingredientsof the mm: pound produce the desired .efl'echl f In thepro c es's asabove set forth crystalsv pf am; Y .monl'um'salts aredescribed as being removed ifromthe'compound,but thisf-isnot necessaf astheseammonium salts have no unfavo d e'ffect' if left in thecompound,the'reasonfor. their removalbeing'merely toconserve them BI I the termLamin bases isup i with-'thegroup GHa'or its homologues substituted ,forone orinore of I thehydrogen'atomsin the co mpoundcs; a. matterofeconoin it is also preferable rouse I the residue from eet'sugarmolalsses instead of the molasses itself,but'theprocessisjnotlimited to using the .residueas a starting.

parts by weight of zinc oxid, 5 parts by weight of sulfur 1. J'Iheproportions of sulfur and'accelerating ,agent, may, of course',-fbemodified to meet the requirements as to the kind of rubberwhich 3 i;v

is to be produced. Alt atem er'ature of from .135 to 145 degreescentigrade in'a press'the etc in. about I also be practised or otherforms W The uantity'o'f accelerating a ent as-required y this process is'relativefi'f small as compared with other yaccelerating agents withwhich I am familiar and lthe'rubber'" The accelerator wi l work welllitharge contrary to most accelerators.-

This accelerator makes possible. vulcanina tionat a very' lowtemperature, a good cure I jin the above compound taking placeiin anhourat 108 degrees centigrade provided the Y salts of lead, or compounds ofthe metals whose reactions in the presence ,of sulfur are ent. If percent. of lea oxi (litharge) isv present the temperature necessary forvul caniz'ation is raised and vulcanization does not take place at 108degrees 0. although at the regular vulcanizing I :cording. to theifollowing -formu1a a example: a p I parts by weight of plantationrubbeni' duced in the distillation in the retort may be 3 used assuch informingthe compound, ..or---" I 5' v %-part by weight of theaccelerating'com f tralize them. Theacid used, is'preferably temperaturethe tie- I presence of a compound produced irom beetlitharge has noretardin efiect;

culiarity makes it possi le to modify the action of this acceleratorthrough the use of small quantities of lead salts.

WhatIclaimis: r v n -s 1. The process ofaccelerating the vulcanizationof rubber which consists in vulcanizing therubber by sulfur and,- in thesugar-residue and including the amin bases formed therefrom incombination with car- I bon disulfid.

' 3.: The process of accelerating thejgvul canizationof rubberrkwhichconsists in vulcanizing'the rubber in the. presence-of acome,

'- pound of the amin bases produced by .de-'

structi've distillation from beet sugar residue combined with carbondisulfid;

.4. The process of accelerating mid of the amin bases producedby de- Idiructive-distillation from beet sugar moand'inculdin'g the amin formedthere-- lasses'residue combined with carbon disu'lfid.

" '5'. Theupr'ocess of-acceleratingthe -vul canization of whichconslsts' in vulcanizing the-rubber'tinthe presence of a com-v undproduced by the combinati'on' with carbon-disulfid-of the armnbasescontained in the products of the destructive disti1la-' tion-"of beetsugar residue.

6. The process of accelerating the yulcanization of rubber whichconslsts' in vulcanizing the rubber in the presenceofa compound.produced from beet sugar residue amin bases produced from beet thevul-f canization of rubber which consists in vul- 1 -vcanizing therubber in the presence of a co m'- sugar molasses from, after theammoniuiiia i irodu slhave i been removed therefrom, .in combinationwith carbon disulfid. r h 7. The process of accelerat' the vulcan zationof rubber'which conslsts in ,vul camzing the rubberin the presenoeofacompound of lead by the use of a compound produced from beet ,su'garresidue and includin th'e amin basesfformedtherefronif in com inationwith carbon disulfid.

8. As a new article of manufacture vulcanized rubber combinedbeforelvulcan'iza- -tion with a compound formedby the destructiyedistillation of beet sugar residue an'd including- 'ithe aminbases thus.produced combined with carbon disulfid.

' 9. As a new article of-manufacture vulcanized rubber combined. beforevulcanization with a c mpound of .the amin bases producedirom beet sugarresidue combined .withcarbon disulfid. l 1

' 10. As a'new article of manufacture vul- -Ycanizedrubber combinedbefore vulcanization'with a compound of the aminbases reduced bydestructive distillation from t. sugarresidue combined with carbon.disulfid." I 11. As a newarticle of manufacture-yuL .canized "rubbercombined before vulcaniza- "/0 tion with a compound of the amin'basesproduced by destructive distillation from beet residue combined withcarbon disulfid.

12. As a new article of manufacture yul- '75 'canized rubber combinedbefore yulcaniza- I tion with a compound of lead and with a' compoundformed by the destructive 'distillation of beet sugar residue andincludin j the arhin bases thusproduce'd combined wit carbonBENTONJHOLONY.

